Peñafiel is a town in the Valladolid Province and the greater autonomous community of Castile and León, Spain. It is best known for the Peñafi…Peñafiel is a town in the Valladolid Province and the greater autonomous community of Castile and León, Spain. It is best known for the Peñafiel Castle and for its medieval square used for bullfights and named "Plaza del Coso". The square is surrounded by private homes, but since medieval times the rights to use their windows, balconies and doorways during bullfights are owned by the town, which auctions them to the highest bidders.